what about the differences between the ones with the yellow lines faceplate and white lines face plate?
They have slightly different electronic and physical designs, as well as some cosmetic differences. For example, the "white" models lack the block diagram that the "yellow" models have screened on top. I prefer the "white" model because the case is shallower, so there's more room behind it in the rack, which I find useful. The audible and functional differences are negligible, really. I have schematics and parts lists for both, so e-mail me if you want/need them.